Blow-off deheater for boilers



Aug. 29, 1933. E, R BROCK 1,924,733

BLOW-OFF DEHEATER FOR BOILERS Filed Aug. '4, 1932 2 Sheets-Sheet l liweniorf Edward Iffirock,

29, 1933- E. P. BROCK BLOW-OFF DEHEATER FOR BOILERS Filed Aug. 4, 1932 2 Sheets-Sheet Inventor: Edward .EBrock, by

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Patented Aug. 29, 1933 "ill llfilill STATS BLOV- OFF DEHEATER FOR, BOILERS Edward P. Brock, Danv ers, Mass.

Application August 4, 1932; Serial No. 627,455

16 Claims. (61. 137r-l52) This invention relates to deheaters for the blow off of boilers and particularly to a mechanism of this character which is adapted to be connected to sewer pipes, the object being to cool the steam or hot water coming from the boiler before it enters the sewer pipes'thereby preventing danger and damage to the sewers which often occurs when live steam or hot water is discharged directly into said sewer pipes.

This object is attained by the mechanism illustrated in the accompanying drawings.

For the purpose of illustrating the invention, one preferred form thereof is illustrated in the drawings, this form havin been found to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized, and the invention is not limited to the precise arrangement and sewer or waste pipe.

Figure 3 represents an elevation of oneof' the inlet nozzles.

Figure 4 represents a longitudinal section of a longer inlet nozzle.

Figure 5 represents an elevation of the valve tripping cam member.

Figure 6 represents a horizontal section on line 6,6 on Fig. l, and

Fig. 1.

Similar characters indicate like parts throughout the several figures of the drawings. i

In the drawings, is is a tank provided with a cold water inlet 11 and a vapor outlet 12.

From a point near the bottom of this tank extends a line of pipe 13 provided'with an up- The lower end of the pipe portion 16 communicates with a branch 18 ofthe sewer pipe 17, the

end 19 of which: may be connected to any soil or waste pipe in a well known manner. a

In the pipe 1'7 is a trap 20 of any well known shown in connection with a cooling tank and a in the path of any steamor'water flowing through Figure '7 represents a section on line 7,? on

lines thereby moving the stem 32 into its dotted construction. From a point near. the top of the tank 10 extends a pipe 21 which is connected to one end of a housing 22 having two upwardly extending branches 23, 24v. v v

The opposite end of the housing 22 is connected to the blow off pipe 229: of a steam boiler. The housing 22 is providednear its inlet end with a reduced threaded bore to receive a nozzle 25 having a cone shaped bore and a hexagonal end 253: to which a wrench may be applied when 65 installing the nozzle or removing it from the. housing 22.

The housing 22 is provided with a hand hole 26 and cover 27 therefor. I By removing the cover 2'? access is given to 70 the interior of the housing 22 in order that the nozzle 25 may be removed and another substituted therefor, it being understood that nozzles 25 of different lengths areprovided to accommodate the mechanism for varying condi- 7 tions of operation.

Secured to'the top ofthe branch 24 is a clos-' ing plate 28, having in the center thereof an opening 29 to which is threaded an annular valve seat 30 preferably formed of brass. I 30 Superimposed upon the seat 30 .and normally closing the opening- 30 is a valve member 31 having a downwardly extending stem 32;

The plate providedv with a downwardly extending arm 33. bifurcated at its lower end and having pivoted thereto at 34 a cam member 35 normally contacting with thestem 32.

The cam member has below. its pivot a disk ex tension 36 centered in the bore of housing 22 said housing. a

The flow of liquid in the housing 22 impacting against the dis 36 will cause the cam member 35,

to move into the position indicated in dotted position, tilting the valve 31 on its seat and thus uncovering the opening 3c.

The movement of the stem 32 from the vertical position is limited by the stop member 37 forming a part of the arm 33. 1 i

Extending upwardly from the plate 28 is an annular projection 38 having threaded thereto a cap 39 provided with downwardly extending fingers 40 contacting with the periphery of the valve member 31. I

A pipe il extends upwardly from the cap 39 to the cover 42 of the chambered member' lfisecured to the top of the branch 230i housing 22.

The chamber ii of the member 43:11as apar 110 tition 45 therein having an opening 46 therethrough alined with the branch 23 of housing 22.

The upper end of the member 43 is cylindrical and disposed in this cylindrical upper end is a reciprocable valve member 47, the lower end 48 of which is of less diameter than the upper part thereof and is adapted to close the opening 46 under normal conditions.

A water pipe 49 from a suitable source of supply communicates with the chamber 44 at a point above the partition 45. This pipe 49 is provided with a strainer 49:0 of usual construction.

The upper end of the valve member 47 does not fit the cylindrical end of member 43 so closely but that water will seep between its periphery and the cylindrical wall of member 43 and pass through the pipe: 41 to close the valve 31 under certain conditions to be hereinafter described.

In the center of the valve 47 is a cylindrical member 50 adapted to contact with the lower end of screw 51 to limit the upward movement of said valve 47.

The screw 51 is threaded to cap 42 and adjustable endwise therein, being held in adjusted position by the clamp nut 52.

Under ordinary conditions the various elements of the mechanism are in the position shown in full lines in the drawings and the pressure on the opposite sides of the valve 47 is balanced so that said valve remains on its seat.

When the boiler is blown off, the impact against the disk 36 of the steam and water in housing 22 will actuate the cam 35, causing the opening of the valve 31 thus permitting the water in the pipe 41 to pass into the housing 22.

When the water passes from thepipe 41 there will be no pressure above the valve 47 and the flow of water from the pipe 49 will lift the valve 47 from its'seat permitting the water in pipe 49 to pass through the opening 46 into the housing cool.

The water discharged from this tank into the sewer pipe 17 will be in such condition that no damage can be done to the pipe and no steam will be admitted to said pipe 17 to escape through man holes and cause inconvenience to pedestrians in the vicinity of said man holes.

At the completion of the blowing 01? of the boiler the cam member will return to its normal position closing the valve 31.

As soon as thisvalve 31 is closed, the water seeping past the valve member 47 will build up a pressure in the pipe 41 and in the upper part of member 43, sufiicient to close the valve 47,

7 thus preventing any further admission of water to the housing 22 until it is necessary to blow necessary to determine if the mechanism is-always in working order.

The member is supported near its upper end by guide fingers 53 forming part of the valve member 47, the lower end of said member 50 being threaded to a disk 54 between which and the body of the member 47 is an annular member 55 of composition, this annular mem--' ber 55 coasting with the valve seat 56 when said .valve is closed.

Owing to the bore of the nozzle 25 being coneshaped, any liquid passing through the same will be discharged therefrom in the form of a adapted to impact against the disk 36. It will be noted that the pressure on the upper part of the valve 47 extends over a much greater surface than the pressure of the water from pipe 49 against the under surface of said valve and due to this fact the pressure in the pipe 41 will retain the valve 4'? closed as long as the valve 31 remains closed.

This means of deheating the discharge from a boiler during the blow off is simple to construct, readily cared for, and very effective in operation.

It is believed that the operation and many advantages of the invention will be understood readily without further description.

Having thus described my invention, I claim:

1. In a deheater for the blow off of boilers, the combination of a housing; an inlet nozzle extending into one end thereof; a water inlet to said housin a reciprocable valve for said inlet; means for creating a pressure above said valve by the inlet water to retain the valve in closed position; and mechanism including a pivoted member in the path of and actuated by the discharge of liquid from said nozzle for reducing said pressure and permitting the opening of said valve.

2. In a deheater for the blow off of boilers,

the combination of a housing; an inlet nozzle extending into one end thereof; a water inlet to said housing; a reciprocable valve for said inlet; means for creating a pressure above said valve by the inlet water to retain the valve in closed position; and mechanism including a pivoted cam member provided with a disk within said housing and in front of said nozzle to reduce said pressure and permit the opening of said valve when said member is actuated by the liquid discharged from said nozzle.

3. In a deheater for the blow off of boilers, the combination of a housing; an inlet nozzle in one end thereof adapted to discharge liquid through said housing; a water inlet to said housing; a reciprocable valve therefor normally closed by the pressure of the inlet Water; and means including movable member within said housing adapted to be actuated by the discharge from said nozzle for reducing the pressure on saidvalve and thereby controlling the operation of said valve.

4. In a deheater for the blow off of boilers, the combination of a housing provided with two upwardly extending branches; an inlet nozzle in one end of said housing; a chambered member secured to one of said branches and provided with a water inlet to saidbranch; a valve for closing said inlet and adapted to be opened by the inflow of water against a lower surface thereof; a pipe leading from the top of said chambered member to the other branch; clo ing means in the other branch for preventing flow of liquid through said pipe; and means ex tending into the housing in front of said nozzle 7 adapted to be actuated by the-discharge from said nozzle for lifting said closing means and permitting the liquid in said pipe to enter said housing.

5. In a deheater for the blow off of boilers, the -i' ter inlet to said branch; a valve for closing said inlet and adapted tobe opened by the inflow of water against a lower surfacethereoi; a pipe leading from the top of said chambered member to the other branch; closing means in the other branch for preventing flow of liquid through said pipe; and means extending into the housing in front of said nozzle adapted to be actuated by the discharge from said nozzle-for lifting said closing means and permitting the liquid in said pipe to enter said housing, said closing means'having a depending stem normally contacting with a pivoted cam member movable about its pivot'by the discharge from said nozzle.

6. In a deheater for the blow oif of boilers, the combination of a housing provided with two upwardly extending branches; an inlet nozzle in one end of said housing; a chambered member secured to one of said branches and provided with a water inlet to said branch; a valve for closing said inlet and adapted to be opened by the inflow of water against a lower surface thereof; a pipe leading from the top of said chambered member to the other branch; closing means in the other branch for preventing flow of liquid through said pipe; and means for lifting said closing means and permitting the liquid in said pipe to enter said housing, said means including a depending stem to said closing means normally contacting with a pivoted cam member movable about its pivot by the discharge from said nozzle against a disk extension to said cam member.

7. In a deheater for the blow off of boilers, the combination of a housing provided with two upwardly extending branches; an inlet nozzle in one end of said housing; a chambered member secured to one branch and having a cylindrical upper end and a partition having an opening therein communicating with said branch; a reciprocating valve reciprocable in said upper end and having a slight space between its periphery and the wall of said member, the lower end of said valve having less exposed surface than the upper end thereof; a water inlet to said chambered member above said partition; a pipe extending from the upper end of said member to the other branch; means in said other branch for closing the outlet of said pipe; and means actuated by the flow of liquid through said housing for uncovering the outlet of said pipe.

8. In a deheater for the blow oil of boilers, the combination of a housing provided with two upwardly extending branches; an inlet nozzle in one end of said housing; a chambered member secured to one branch and having a cylindrical upper end and a partition having an opening therein communicating with said branch; a reciprocating valve reciprocable in said upper end and having a slight space between its periphery and the wall of said member, the lower end of said valve having less exposed surface than the upper end thereof; a water inlet to said chambered member above said partition; a pipe extending from the upper end of said member to the other branch; means in said other branch for closing the outlet of said 1 ipe and means actuated by the flow of liquid through said housing for uncovering the outlet of s id pipe; and adjustable means for limiting the upward movement of said valve.

9. In a deheater for the blow off of boilers, the combination of a housing provided with two upwardly extending branches; an inlet nozzle in one end of said housing; a chambered member secured to one branch and having a cylindrical upper end and a partition having an opening therein communicating with said branch; a reciprocating valve reciprocable in said upper end and having a slight spacebetween its periphery and the wall of said member, the'lower end of said valve having less exposed surface than the'upper end thereof; a water inlet to' said chambered member'above said partition; a pipe extendingircm'the upper end of said member to the other branch means for building up a pressure in said pipe; and mechanism in the other branch actuated by the flow of liquid throughsaid housing for releasing said pressure. y v V 10. In a deheater for the blow off of boilers, the combination of a'ho'u'sing provided with two upwardly extending branches; an inlet nozzle in one end of said housing; a chambered member secured to one branch and having a cylindrical upper end and a partition having an opening therein communicating with said branch; 2, re-

ciprocating valve reciprocable in said upper end and having a slight space between its periphery and the wall of said member, the lower end of said valve having less exposed surface than the upper end thereof; a water inlet to said chambered member above said partition; a pipe extending from the upper end of said member to the other branch; means for building up a pressure in said pipe; and mechanism in the other branch actuated by the flow of liquid through said housing for releasing said pressure, said releasing mechanism comprising a disk valve having a depending stem adapted to be tilted and a cam member coacting with said stem and having a disk extension depending into said housing.

11. In a deheater for the blow off of boilers, the combination of a housing; an inlet nozzle therein; a water inlet thereto, a reciprocable valve therefor normally closed by the pressure of the inlet water; and automatic mechanism including a pivoted member within said housing adapted to be actuated by the discharge from said nozzle for releasing the pressure on said valve thereby permitting the opening of said water inlet valve and adapted to close the same when said discharge ceases.

12. In a deheater for the blow off of boilers, the combination of a housing; an inlet nozzle thereing; a water inlet thereto, a reciprocable valve therefor normally closed by the pressure of the inlet water; and automatic mechanism actuated by the discharge from said nozzle for releasing the pressure on said valve and permitting the opening of said water inlet and adapted to close said valve when said discharge ceases, said mechanism including in part a valve tripping pivoted member disposed within said housing and having a disk portion in front of said nozzle.

13. In a deheater for the blow off of boilers, the combination of a housing; an inlet nozzle therein adapted to discharge a jet of liquid through said housing; a water inlet to said housing; a reciprocable valve therefor normally closed by the pressure of the inlet water; and mechanism for releasing said pressure and permitting the inlet water to open said valve, said mechanism including a member disposed within said housing and adapted to be moved by the impact of the jet ber within said housing and adapted to be actuated by the discharge of liquid from said nozzle for reducing said pressure and permitting the opening of said valve by the inlet water.

15. In a deheater for the blow off of boilers, the combination of a housing; means forejecting a jet of liquid into one end thereof; a water inlet to said housing; a reciprocable valve for said inlet; means for creating a pressure above said valve by the inlet water to retain the valve in closed position; and mechanism including a pivoted cam member within said housing and provided with a disk in the path of said jet adapted to be actuated by the discharge from said nozzle toreduce 

